Think it's in the process of, technically... even though it was supposed to be May...
PS3 UI/OS video:
Pretty lame in execution, but if this is the actual OS/UI then it shows some interesting things:
-Revamped User Profile
-PSN Matchmaking / Party joining through OS
-Downloading MP separate from SP in games
-Multitasking / playing while games DL/install / instant Video recording and playback
-Cross game chat
-Appears some sort of OS level clan support, or at least "social groups".
-Guys ignoring a hot girl with no real friends